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A market research firm has distributed samples of a new shampoo to a variety of individuals.
The following data summarize the comments of these individuals about the shampoo as well as provide the age group into which they fall.
Use the 5 percent level of significance, these data prove that different age groups have different opinions about the shampoo.
A general contractor is considering purchasing lumber from one of two different suppliers. A random sample of 12 "2x4's" of a certain length of each board is measured.
Using the .10 level of significance, can we conclude that the assembly time using the new method is faster?
As of 2012, the proportion of students who use a MacBook as their primary computer is 0.36. You believe that at your university the proportion is actually greater than 0.36. If you conduct a hypothesis test, what will the null and alternative hypo..
Given that this sample is extremely large, can the responses be considered to be representative of the population of the United States? Explain.
Was your test one-tail upper tail, lower tail, or two-tail? Explain why you chose that kind of test in this situation. Explain what your P-value means in this context.
What is the level of measurement for there is no significant difference between marital ages of men and women? and ther eis a significant difference between marital ages between men and women.
The sensitivity of a test is the probability that a person having the disease will test positive (indicating the person has the disease, i.e., it's the probability the test will pick up the fact that a person has the disease).
the institute reported that entry level wages for male college graduates were 21.68 per hour and for female college
the population mean for verbal iq scores is 100 with a standard deviation of 15. suppose a researcher takes 50 random
the three forms of the research or alternative hypothesis area. high low and neutralb. increased decreased or changedc.
Many newspapers carry a certain puzzle in which the individual must unscramble letters to form words. How many ways can the letters of YARNLE be arranged?
Recall that the trash bag manufacturer has concluded that its new 30 gallon bag will be the strongest such bag on the market if its mean breaking strength is at least 50 pounds.
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